📊 Spread & Slippage: The 2 Hidden Trading Costs You Need to Control
🚨 Did you know that spread and slippage can cost you money WITHOUT you even realizing it?
First, let’s clarify something: spread and slippage are not commissions. They are trading costs that you may incur when executing a trade.
1️⃣ SPREAD — The Bid/Ask Difference
Definition:
The difference between the bid price and the ask price of an asset.
It represents an implicit cost of trading and is closely related to market liquidity.
🧱 Formula:
Spread = Ask Price − Bid Price
📌 Practical Example — Tesla:
Bid: $340.50 → what buyers are currently willing to pay
Ask: $340.55 → what sellers are currently willing to pay
Spread: $0.05
🔎 Where can you see it?
Check the top-left corner of the TradingView chart, where the bid/ask prices are displayed.
🧠 What does this mean for you?
If you want to buy immediately, you generally pay the ask ($340.55).
If you then wanted to sell immediately, you would generally sell at the bid ($340.50).
⚠️ That $0.05 difference is the spread.
In other words, you start with a $0.05 per-share difference to overcome before the price moves in your favor.
🤔 Why does it matter?
✅ A lower spread is better for traders because it means a lower transaction cost.
💧 In highly liquid markets, the spread is usually tighter.
⚠️ In less liquid markets, spreads can become significantly wider.
💡 This is why the spread is an important trading cost to understand. The tighter the spread, the less price movement you generally need to overcome that initial difference.
2️⃣ SLIPPAGE — When Your Execution Price Changes
Definition:
The difference between the price you expect to get and the actual price at which your order is executed. Slippage can happen because of volatility, low liquidity, or execution delays.
📌 Types of Slippage
✅ 1. Positive Slippage: Sometimes, an order executes at a better price than expected.
Example: You expect to buy at $10, but your order fills at $9.90.
❌ 2. Negative Slippage: Your order executes at a worse price than expected.
Example: You expect to buy at $10, but your order fills at $10.10.
🤔 What Causes Slippage?
🌪️ Volatile markets: Economic news, geopolitical events, market shocks, etc.
💧 Low liquidity: Not enough buyers or sellers at your desired price.
⚡ Market orders: They execute at the best available price, which can change within milliseconds.
🎯 Bottom Line:
✅ Low spread + high liquidity = generally better trading conditions.
⚠️ High volatility + low liquidity = greater risk of slippage.
🧠 Understanding these costs is part of becoming a better trader. Small costs can add upsignificantly over hundreds or thousands of trades.
💬 Have you ever been surprised by spread or slippage? Tell us about it in the comments!
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🔗Publication link: https://www.tradingview.com/chart/GOLD/0igQE5FG-No-2-Starting-in-Trading-What-I-Wish-I-Knew-From-Day-One/